3D printer WIFI addon WITH ESP

If you don't have wifi in your printer you could connect another esp to serial port of your printer

Then use this code:

#include <ESP8266WiFi.h>

#include <WiFiServer.h>

#include <WiFiClient.h>

const int WIFI_STANDALONE_ACCESS_POINT_SERVER = 0;

const int WIFI_SERVER = 1;

const int WIFI_CLIENT = 2;

int PRINTER_WIFI_TYPE;

const char *ssid = "...";

const char *password = "wifi_password";

IPAddress serverIP(192,168,43,48); //server ip (the one that sends commands)

const int serverIPPort = 5556; //port

WiFiServer pserver(serverIPPort);

WiFiClient pclient;

bool cliconnected;

void setup()

{

cliconnected = false;

PRINTER_WIFI_TYPE = WIFI_CLIENT;//WIFI_STANDALONE_ACCESS_POINT_SERVER;

Serial.begin(115200); //set baudrate of printer serial

delay(1000);

Serial.println();

Serial.print("Configuring access point…");

if (PRINTER_WIFI_TYPE == WIFI_STANDALONE_ACCESS_POINT_SERVER)

{

WiFi.softAP(ssid, password);

WiFi.begin();

delay(10000);

pserver.begin();

}

if ( (PRINTER_WIFI_TYPE == WIFI_SERVER) || (PRINTER_WIFI_TYPE == WIFI_CLIENT) )

{

WiFi.begin(ssid, password);

while (WiFi.status() != WL_CONNECTED)  { delay(500); }

if (PRINTER_WIFI_TYPE == WIFI_SERVER) pserver.begin();

//if (PRINTER_WIFI_TYPE == WIFI_CLIENT) pclient.begin();

}

IPAddress myIP = WiFi.softAPIP();

Serial.print("AP IP address: ");

Serial.println(myIP);

//server.on("/", handleRoot);

}

void loop()

{

  String request = "";

  if (PRINTER_WIFI_TYPE == WIFI_SERVER) 

  {

  WiFiClient lclient = pserver.available();

//  

  if (!lclient)

    return; else

    {

    request = lclient.readStringUntil('\r');

   lclient.flush();

    }

  }

if ( (PRINTER_WIFI_TYPE == WIFI_CLIENT) && (!cliconnected) )

if (pclient.connect(serverIP, serverIPPort)) cliconnected = true;

if ( (PRINTER_WIFI_TYPE == WIFI_CLIENT) && (cliconnected) )

{

request = pclient.readStringUntil('\r');

  pclient.flush();

}

if (request.length() > 2)

Serial.println(request);

}